the unlawful act must be a dangerous one - this will be determined through an objective test - in R v Church, it was held that it must be 'such as all sober and reasonable people would inevitably recognise that it must be subject the other person to, at least some harm, albeit not serious harm'. it doesn't matter that the D does not realise the risk of some harm and the act need not to be aimed at the victim - R v Larkin